In the first case, police said they are looking for Cray Williams, 25.

Authorities said Williams is wanted on a federal FBI warrant on charges of money laundering and conspiracy to distribute marijuana.

Williams is black, 5 feet 9 inches tall, 220 pounds, and has black hair and brown eyes. He has tattoos on his hands, wrists and neck.

Investigators said his last known address was in the area of 57th Street and The Paseo Boulevard in Kansas City, Mo. Police said he has been known to use aliases McKinley Kingsley, Jerome Parris and Jason Williams.

Police said Williams should be considered armed and dangerous.

In the second case, police said they are looking for Joe Willie Robinson, 52.

Robinson is wanted on a Platte County, Mo., warrant on charges of violating his sex offender registration.

Robinson is black, 6 feet 1 inch tall, 150 pounds, and has black hair, brown eyes and tattoos on his arms and chest. Police said he sometimes goes by the alias Robert Robinson and should be considered dangerous.

His last known address was in the area of 61st Street and Northwest Prairie View Road in Kansas City, Mo., police said.

Anyone with information on either case is asked to call the TIPS Hotline at 816-474-8477.